Hand and pinion remover



y 1944-. G. D. GUSTAFS ON 2,349,497

HAND AND PINIQN REMOVER Filed June 13, 1942 Patented May 23, 1944 UNITED STATES PATENT OFFICE HAND AND PINION REMOVER Gunnar D. Gustafson, Chicago, Ill. Application June 13, 1942, Serial No. 446,863

8 Claims.

This invention relates to improvements in hand and pinion removers and it consists of the matters hereinafter described and more particularly pointed out in the appended claims.

The invention is more especially concerned with a hand and pinion remover f the kind that embodies laterally spaced yieldable arms each carrying a jaw at one end to grip the hand or pinion to be removed from a shaft and withwhich is associated a plunger-like stem to press against the end of the shaft and to coact with said jaws in holding the removed hand Or pinion against snapping away and becoming lost. As an example of the general type of hand and pinion remover above mentioned, reference is made to my prior Patent 2,277,587 of March 24, 1942.

One of the objects of the present invention is to provide a hand and pinion remover of the kind above mentioned, which includes a plurality of stem-like tools, any selected one of which may be readily moved into a locked position to cooperate with the grippin jaws of the remover in the intended use thereof.

Another object of the invention is to provide a hand and pinion remover of the kind mentioned that includes a rotatable turret that carries a plurality of stem-like tools, any selected one of which may be disposed in operative position with respect to the jaws of the device by turning the turret on it against a turning movement.

The above mentioned objects of the invention, as well as others together with the several advantages thereof will more fully appear as the specification proceeds.

In the drawing:

Fig. 1 is a perspective view of a hand and pinion remover embodying the preferred form of the invention, ona scale enlarged over full size, and illustrates the parts in the normal non-gripping relation.

Fig. 2 is a vertical longitudinal sectional view through the jaw end of the remover, on a scale enlarged over that of Fig. 1 and shows the parts in gripping relation.

Fig. 3 is a vertical detail sectional view through a part of the improved hand and pinion remover as taken on the line 3-3 of Fig. 2.

Fig. 4 is a view similar to Fig. 3 with parts in a changed relation.

Fig. 5 is an enlarged longitudinal sectional view through one of stem-like tools appearing in Figs. 3 and 4 and which will be more fully referred to later.

Referring now in detail to that embodiment of.

its axis and then looking the invention illustrated in the drawing, the improved hand and pinion remover includes a pair of laterally spaced and generally straight resilient arms I ll-IO preferably or spring steel. Said arms are secured at one end to opposite sides of a tongue II fastened in a handle l2 in any suitable manner. Said arms diverge toward the other and What may be termed the outer end where each arm there carries a jaw l3 and is there provided with a longitudinal slot M. The jaws l3 on said outer end of said arms face inwardly toward each other and are relatively thin in cross section compared to that of the associated arm. The resiliency of the arms is such that normally the facing edges of the jaws are spaced a suitable distance apart.

Between the jaw end of the arms is located a multiple stem-like tool unit that includes a transverse shaft t5, the ends of which extend through and beyond the slots M in said arms, the diameter of the shaft approximating the width of said slots. Fixed to the mid portion of the shaft is a turret head l6, which carries a plurality of stem-like tools l1, l8, l9 and 20 respectively. Said tools are preferably arranged in pairs, with the tools ofeach pair disposed radially and in axial alignment upon opposite sides of the head. Preferably the inner end of each stem-like tool is threaded into the turret head as appears in Fig. 2. The tools I 1, l8 and I 9 are male tools of different diameters at the effective outer end while the tool 20 is a female one for a purpose later to be described. All of said tools have the same and largest outside diameter in at least one part thereof.

Helical expansion springs 2l-2l surround those parts of the shaft I5'between the opposed faces of the arms Ill-I0 and the turret head 16 respectively. Said springs function not only to center the turret head with respect to the arms but they also function to assist in spreading the jaw ends of the arms Ill-40 apart and which is the normal position therefor.

An outwardly bowed leaf spring element 22 is associated with the outer face of each arm l9 and one end of each element is fastened to that end of each arm 10 that is associated with the handle l2. The other or outer end of each spring element is disposed to engage upon a part of the outer face of the jaw end of the associated arm l0 so as to overhang or cover a part of the slot l4 therein. The last mentioned end of each element has an opening 23 therein which is of a diameter approximating the width of the slot I4 and with which it registers. The ends of the shaft l5 also pass through the openings 23 in the elements 22 and the extremities of said shaft each carries a screw 24. The heads of said screws are of a diameter larger than that of the shaft and act as stops or limiting shoulders for the outward spread of both the arms ill-40 and the elements 2222.

25 indicates a stem-like element arranged centrally between the arms !-I0 and fixed at one end in the tongue II. This stem-like element receives one end of a tubular plunger 26 which is urged toward the jaw end of the arms Ill-40 by a spring 21 that surrounds that part of the stem between the tongue H and adjacent end of the plunger. On the other end of the plunger, which has an internal bore fitting the part of largest diameter of any of the tools I1-l3--'l9 and 20 is an external shoulder 28.

The female tool 20 is provided at its outer end with a bore 29 and a transverse opening 30 as best shown in Fig. and is especially adapted for use in connection with work involving astaff 3| having a pivot 32. The bore 29 of the tool is adapted to receive the pivot so that the extreme end of the tool rests directly on the end of the staff. Thus endwise pressure may be imposed upon the shaft without danger of damaging the pivot. Should any dust or the like accumulate in the bore, it can work its way out through the opening 30 so that the bore 29 which is of a small diameter cannot become clogged.

In the use of the device in removing a hand 33 from a watch or other instrument, after judging the diameter of the shaft 34 upon which the hand is engaged, the operator grasps the shoulder 28 and pushes the plunger 26 toward the handle l2 so that the outer extremity of the plunger clears the stem-like tool l'|-l8-l9 or that may be engaged therein. The turret l6 and shaft I5 is then turned to dispose the desired tool l'|-l8--I9 or 20 in operative position with respect to the jaw end of the arms Ill-l0. The plunger 26 is then allowed to yield outwardly to that extent wherein that tool opposite the one disposed in said operative position enters the outer end part of the bore in the plunger. When the plunger is released, it yields outwardly until its extremity engages the turret. Thus one of the tools is disposed in the plunger and this locks the turret against rotation or a turning movement.

The remover as a whole is then disposed so that the jaws I3 are disposed upon opposite sides of the hub of the hand 33 which is mounted upon a shaft or arbor 34. The bowed spring elements 2222 are now sprung inwardly by finger pressure which tends to straighten out said elements so that in effect they elongate and the ends thereof, with the openings 23 therein, move outwardly toward the jaws l3 on the arms. As the ends of the shaft I5 are engaged in said ends of the spring elements, this causes the shaft l5 and turret Hi to move outwardly in the slots ll toward the now closing and gripping jaws and the tool |'|-l8l9 or 20 which is in operative position with respect to said jaws presses against the hand from above. With the jaws gripping the hub of the hand and with the tool ll-I8-|9 or 2B pressing upon the hand axially of the hub, the hand is securely gripped and may be slowly pulled from its shaft. As the hand is so gripped as mentioned, it cannot snap or spring away from the remover as it is released from its aft so that said hand cannot be lost.

emover made as described may be used in connection with many different sizes of parts to be removed. Th a watch or fine instrument worker does not need a separate tool for each size of part to be removed because with the remover described herein, it may be used with many different sizes of parts.

The device may be easily and quickly manipulated to dispose the selected tool in the operative position and in which position said tool is securely locked.

While in describing the invention I have referred in detail to the form, arrangement and construction of the parts involved, the same is to be considered only in the illustrative sense whereby the desired tool of any one pair so that I do not wish to be limited thereto except as may be specifically set forth in the appended claims.

I claim as my invention:

1. In combination with a turret having pairs of oppositely disposed tools projecting from its periphery, means in which said turret is mounted for a turning movement about its axis and may be disposed in working position, a stem-like element carried by said means in line with the other tool of said one pair, and spring-pressed means having a sliding guided engagement with said element for movement into and out of engagement with the other tool of said one pair thereof, said last mentioned means when engaged with said other tool, locking the turret against turning movement to hold said desired tool in working position and when disengaged from said other tool permitting the turret to be turned about its axis to dispose another of said tools in said working position.

2. In combination with a turret having pairs of oppositely disposed tools projecting from its periphery, means in which said turret is mounted for a turning movement about its axis and whereby the desired tool of any one pair may be disposed in working position, and means having a bored end mounted for reciprocating movement into and out of telescopic engagement with the other tool of said one pair thereof, said last mentioned means when its bored end is telescopically engaged with said other tool, locking the turret against turning movement to hold said desired tool in working position and when disengaged from said other tool, permitting the turret to be turned about its axis to disposed another of said tools in said working position.

3. In combination with a turret having pairs of oppositely disposed tools projecting from its periphery, a shaft having its ends projecting from opposite faces of said turret, means in which said shaft ends are disposed for a sliding as well as a rotative engagement and whereby the desired tool of any one pair may be presented to and moved into working position therefor, a stem-like element carried by said means in line with the other tool of said one pair, and spring pressed means having a sliding guided engagement with said element for movement into and out of engagement with the other tool of said one pair thereof, said last mentioned means when engaged with said other tool locking the turret against turning about the axis of the shaft and when disengaged from said other tool permitting the turret to be turned about said axis to dispose another of said tools in said working posiion.

4. In combination with a turret having shaft parts extending from opposite ends thereof, pairs of oppositely disposed tools projecting from the periphery of the turret, means in which said shaft parts are engaged for either a turning movement to dispose a selected pair of tools in a plane parallel with said means or a longitudinal movement from an inoperative to an operative position for one tool of the selected pair, means engaged With said shaft parts and operable to impart movement to said shaft parts longitudinally of the first mentioned means from the inoperative position of said one of said tools to the operative position therefor and vice versa, and other means normally engaged with and movable with the other tool of said pair for holding the turret against turning as it moves from one position to another for said one tool of said selected pair, said other means being operable from said other tool of the selected pair so that said turret may be turned with respect to the first mentioned means to dispose another pair of tools in said plane.

5. In combination with a turret having shaft parts extending from opposite ends thereof, pairs of oppositely disposed tools projecting from the periphery of the turret, means in which said shaft parts are engaged for either a turning movement to dispose a selected pair of tools in a plane parallel with said means or a longitudinal movement from an inoperative to an operative position for one tool of the selected pair, means engaged with said shaft parts and operable to impart movement to said shaft parts longitudinally of the first mentioned means from the inoperative position of said one of said tools to the operative position therefor and Vice versa, and a spring pressed member normally engaged and movable with the other tool of said pair for holding the turret against turning as it moves from one position to another for said one. of said tools of said selected pair, said spring pressed member being operable to release it from said other tool of the selected pair so that the turret may be turned with respect to said first mentioned means to dispose another pair of tools in said plane.

6. In combination with a turret having shaft parts extending from opposite ends thereof, pairs of oppositely disposed tools projecting from the periphery of the turret, a member arranged at each end of the turret and each having a 1ongitudinal slot therein and in which said shaft parts are engaged for either a turning movement to dispose a selected pair of tools in the plane of said slots or a longitudinal movement from an inoperative to an operative position for one tool of the selected pair, means engaged with said shaft parts and operable to impart movement to said shaft parts longitudinally of said slots from the inoperative position of one of said tools to the operative position therefor and vice versa, and other means normally en gaged with and movable with the other tool of said pair for holding the turret against turning as it moves from one position to another for said one tool of the selected pair, said other means being operable to release it from said other tool of the selected pair so that said turret may be turned with respect to the first mentioned means to dispose another pair of tools in said plane.

7. In combination with a turret having shaft Darts extending from opposite ends thereof, pairs of oppositely disposed tools projecting from the periphery of the turret, a member arranged at each end of the turret and each having a longitudinal slot therein and in which said shaft parts are engaged for either a turning movement to dispose a selected pair of tools in the plane of said slots or a longitudinal movement from an inoperative to an operative position for one tool of the selected pair, means engaged with said shaft parts and operable to impart movement to said shaft parts longitudinally of said slots from the inoperative position of one of said tools to the operative position therefor and vice versa, and a spring pressed member normally engaged and movable with the other tool of said pair for holding the turret against turning as it moves from one position to another for said one tool of the selected pair, said spring pressed member being movable with respect to said other tool to disengage it therefrom so that the turret may he turned with respect to the first mentioned means to dispose another pair of tools in said plane.

8. In combination with a turret having shaft parts extending from opposite ends thereof, pairs of oppositely disposed tools projecting from the periphery of the turret, means in which said shaft parts are engaged for either a turning movement to dispose a selected pair of tools in a plane parallel With said means or a longitudinal movement from an inoperative to an operative position for one tool of the selected pair, means engaged with said shaft parts and operable to impart movement to said shaft parts longitudinally of the first mentioned means from the inoperative position of said one of said tools to the operative position therefor and vice versa, a spring pressed member disposed in said plane movable on a fixed support therefor and normally engaged at one end with the other tool of said pair for holding the turret against turning as it moves from one position to another for said one of said tools of the selected pair, said spring pressed member being slidable on its support away from the turret so as to be released from said other tool of the selected pair so that said turret may be turned with respect to the first mentioned means to dispose another pair of tools in said plane.

GUNNAR D. GUSTAFSON. 

